Title:
MAGNETIC POLE POSITION ESTIMATION METHOD AND CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/150868
Kind Code:
A1
Abstract:
The purpose of the present invention is to reduce the amount of movement of a rotor during estimation of a magnetic pole position of an electric motor. Provided is a magnetic pole position estimation method provided with: a first step of setting an initial position of a magnetic pole; a second step of increasing a q-axis current command value gradually, and detecting an operating direction and the amount of movement of the rotor; a third step of causing the magnetic pole position to be rotated toward 180 degrees in a positive direction when the operating direction is positive, and causing the magnetic pole position to be rotated toward 180 degrees in a negative direction when the operating direction is negative; a fourth step of storing the magnetic pole position when the amount of movement has become zero in the third step as an actual measurement magnetic pole position of the rotor; and a fifth step of storing a magnetic pole position obtained by rotating the actual measurement magnetic pole position by -90 degrees as a control start position.
Inventors:
UEI YUSUKE (JP)
TAKANO YUURI (JP)
YANADA TETSUO (JP)
TAKANO YUURI (JP)
YANADA TETSUO (JP)
Application Number:
PCT/JP2018/048073
Publication Date:
August 08, 2019
Filing Date:
December 27, 2018
Export Citation:
Assignee:
HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)
International Classes:
H02P21/32; H02P6/16; H02P21/22
Domestic Patent References:
| WO2007114058A1 | 2007-10-11 | |||
| WO2017022588A1 | 2017-02-09 | |||
| WO2011115098A1 | 2011-09-22 |
Foreign References:
| US4595870A | 1986-06-17 | |||
| JP2018016143A | 2018-02-01 | |||
| JP2014036450A | 2014-02-24 |
Other References:
See also references of EP 3748840A4
Attorney, Agent or Firm:
ASAMURA PATENT OFFICE, P.C. (JP)
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